I found a great video on Scholastic Study Jams on the scientific method. I love Scholastic Study Jams... you can search just about any topic and find either a video or an activity to teach that topic.
After discussing each of the scientific method steps, it was time to experiment! We did the Case of the Runaway Pepper, which I found from Susan Cahalane on TPT. Susan's freebie comes with steps to complete the experiment, a sheet outlining the scientific method sheet, and an activity sheet for students to fill out. My students had so much fun with this experiment!
What experiments do you use to teach scientific method??